.app{
	width: 100%;
	height: 100vh;
	background-color: #ffffff;
	position: relative;
	display: flex;
	justify-content: center;
	align-items: center;
}
label{
	position: relative;
}
input{
	width: 140px;
	height: 36px;
	line-height: 36px;
	outline-style: none;
	font-size: 16px;
	color: #333;
	border: none;
	padding: 0 8px;
	box-sizing: border-box;
}
.line{
	width: 0;
	height: 2px;
	display: block;
	background-color: #4158D0;
	background-image: linear-gradient(90deg, #4158D0 0%, #C850C0 48%, #FFCC70 100%);
	transition: all 0.24s ease-in-out;
}
input:focus+.line,input:valid+.line{
	width: 100%;
}
